Page 234 - Shaping smarter and more sustainable cities - Striving for sustainable development goals

end‐users (supply side: i.e.,
end‐users (demand side: i.e.,
users layer stakeholders'
inhabitants)
representatives)
presentations layer

applications layer (software Transportation, E‐government, E‐business, Safety and
applications offering SSC Emergency, Smart health, Tourism, Education, Smart
services) Building, Waste management, Smart Energy, Smart water

business layer (business
Cyber‐security Communications Network layer Transport network (SDH, DWDM,
processes that simulate
service logic)
IP, Microwave etc.)

Access network (xDSL, FTTx, WiFi,
2G/3G/4G, PLC etc.)

Data repositories
data layer

File repositories

Capillary Network (SCADA, sensor network,
HART, WPAN, video surveillance, RFID, Barcode,
GPS, etc.
sensing layer
Terminal node (sensor, transducer, actuator,
camera, RFID tag, barcode symbols etc.

Figure 5 – A multi‐tier SSC ICT architecture from communications view,
(information flow perspective)

Both these perspectives concern valid representations of the same architecture, one closer to the
language of infrastructure developer the second more in line with the context required for
information system developers. The architecture is consists of the following layers (illustrated in
Figure 4.):
 Sensing layer: This layer consists of a terminal node and capillary network. Terminals (sensor,
transducer, actuator, camera, RFID reader, barcode symbols, GPS tracker, etc.) are capable of
sensing the physical world. They provide the superior “environment‐detecting” ability and
intelligence for monitoring and controlling the physical infrastructure within the city. The
capillary network (including SCADA, sensor network, HART, WPAN, video surveillance, RFID, GPS
related network etc.) connects various terminals to the network layer, providing ubiquitous and
omnipotent information and data.
 Network layer: The network layer indicates various networks provided by telecommunication
operators, as well as other metro networks provided by city stakeholders and/or enterprise
private communication network. It is the “infobahn”, the network layer data and support layer:
The data and support layer makes the city “smarter”. Its main purpose is to ensure the support
capabilities of various city‐level applications and services. Data and support layer contain data

224 ITU‐T's Technical Reports and Specifications